LeetCode 63. Unique Paths II

Posted 2020-11-13 Shendu.cc

题目

水题，和上一题一样的。

class Solution {
public:
    long long int dp[105][105];
    int uniquePathsWithObstacles(vector<vector<int>>& obstacleGrid) {
        
        
        for(int i=0;i<obstacleGrid.size();i++)
        {
            for(int j=0;j<obstacleGrid[0].size();j++)
            {
                if(obstacleGrid[i][j]==1)
                {
                    dp[i][j]=0;
                    continue;
                }
                if(i==0&&j==0)
                {
                    dp[i][j]=1;
                    continue;
                }
                    
                if(i==0)
                {
                    dp[i][j] = dp[i][j-1];
                    continue;
                }
                if(j==0)
                {
                    dp[i][j] = dp[i-1][j];
                    continue;
                }
                dp[i][j]=dp[i][j-1]+dp[i-1][j];
            }
        }
        
        return dp[obstacleGrid.size()-1][obstacleGrid[0].size()-1];
    }
};